In a couple of weeks I'm supposed to be meeting a UK friend who is on a road trip out west. This was originally going to be in Colorado, but his plans have altered and he's currently in Vegas - and reluctant to drive the 20 or so hours to Denver. I'm also short of time so I'd rather not fly to Vegas and then e.g drive to Salt lake.

So the question is...at this time of year, are there any reasonable climbing destinations near Vegas that are not too hot or too far? I know about the limestone and the Sierras, but do not have time to acclimatize for the latter. Any suggestions?